Cycle.



Patented Oct. 10, I899. M. PEDERSEN.

r cvcu-z. (Appiicltion filed Dec. 28. 1897.)

7 2 Sheets-Sheet I,

(No Model.)

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I, No. 634,585. Paten ted Oct. :u,1e99'.'

- up. PEDERSEN.

CYCLE.

{Application filed Dee. 28, 1897.,-

UNITED STATES? PATENT OFFICE.

MIKAEL PEDERSEN, OF DURSLEY, ENGLAND.

CYCLE.

SPECIFICATION forming'part of Letters Patent No. 634,585, dated October10, 1899. Application filed December 28,1897. Serial No. 664,050. (Nomodel.)

To all whom it may concern:

Be it known that I, MIKAEL PEnEnsEN, a subject of the King of Denmark,residing at Dursley, England, have invented new and useful Improvementsin or Connected with Bicycles, (for which I have obtained a patent inGreat Britain, No. 16,899, dated July 30, 1896,) of which the followingis a specification.

My invention relates to bicycles having frames constructed in the mannerdescribed in the specification of my former patent, No. 577,170, datedFebruary 16, 1897, the object of my present invention being to provideimproved means for jointing or connecting the various parts of theframe, and it comprises the improvements hereinafter described.

In the accompanying drawings, Figure 1 is a perspective view of my'improved frame. Fig. 2 is a side elevation of the head of thesteering-fork, drawn to a larger scale than Fig. 1, and Fig. 3 is asection on the line 3 3, Fig. 2, drawn to a still larger scale. Fig. 4is a side elevation of the lower end of one side of the steering-fork,and Figs. 5 and 6 are sections on the lines 5 5 and 6 6, respectively,of Fig. 4, drawn to a larger scale than said figure. Fig. 7 is a sideelevation of the upper part of the frame in which the steering.

fork is pivoted, and Fig. 8 is a rear elevation of the same. Fig. 9 isaview of the connecting-piece of this part detached, and Fig. 10 is asection on the line 10 10, Fig. 8, drawn to an enlarged scale. Fig. 11is a side elevation of the rear part of one side of the frame at thefork end, and Figs. 12 and 13 are sections on the lines 12 12 and 13 13,respectively, of Fig. 11 looking in the direction of the arrow and drawnto an enlarged scale. Fig. 14 is an under side view of the parts shownin Fig. 11.

a a. a a are the tubes of the head of the front fork. brazed or sweatedin four holes formed in a plate I), as shown in Fig. 3. Over this plateis placed a conical cap 0, having at its upper end the pivot-pin d,which works in a socket in the front of the frame. The lower part ofthis cap is formed with four flaps or extensions e c, Fig. 2, which arealso brazed or sweated onto the tubes. The lower ends of each pair oftubes a a of the front fork are These tubes are fitted into and.

end in such a manner that the rounding of the tube gradually'diminishestoward the lower end, as shown in Fig.4. The flattened portions f of onetube are then placed between the fiattened portions f of the other tube,as shown in Figs. 5 and b, the area of contact between the flattenedportions of the two tubes being much greater at the bottoin,,Fig. 5,than at the top, Fig. 6. These flattened portions, which at their lowerend have an eye g for carrying the front-wheel axle, are brazed orsweated together.

I sometimes insert a piece of fiat steel between'the flattened portionsof the tubes in order to act as a stiffener. V

The jointing of. the pair of tubes h h and the pair of tubes 7; '5 iseffected by uniting them to a steel forging, Fig. 9, having two arms orlimbsj k, to the former of which the tubes 72. h are attached and to thelatter of which the tubes 71 1 are attached, the said forging having thesocket is, adapted to fit onto the pivot-pin d of the fork and havingthe eye Z for the seat connection. The tubes of each pair are flattenedon the sides which come into contact with the limbsj 75 of the saidforging in a manner which will be clearly understood by reference toFig. 10, the said flattened surfaces being inclined relatively with theaxes of the tubes, as clearly; shown in Fig. 8. 1

The tubes h /L, hereinbefore referred to, are at their lower endsconnected to the fork ends m for carrying the rear axle. Each fork endan has upon it two tongues n n-namely, one for one of the tubes h andanother for one of the bottom tubes 0-and each tube h and o is split atthe end to embrace its tongue n on both sides, the portion of the tubeon each side of the tongue being gradually flattened out, so that therounding of the tube merges into the flat surfaces or fiangespp, whichflat surfaces or flanges are brazed or sweated to the sides of thetongue, as clearly 'shown in.

Figs. 12', 13, and 14.

The'bottom bracket q, to which the several pairs of tubes it, 0 o, r a",and s s of the-frame are connected, is constructed with sockets for thetubes in the usual manner or with tongues similar to the tongues 11. non the fork ends, each of the said tubesw being split and brazed on itstongue. The front ends of the tubes 1' 0', Which are in connection withthe steering-fork,are connected to atongue on a swivelpiece in the samemanner that the tubes 71 77/ and r} i are connected to their tongues j7;. The upper ends of the tubes 8 s are also connected together by atongue in a similar manner to the tubes h h and'rl Having nowparticularly described and ascertained the nature of my said inventionand in What manner the same is to be performed, I declare that What Iclaim is 1 A bicycle-frame comprising among its members, a front fork,consisting of a plurality of bars, provided at their lower ends withmeans for engaging the axle of the front Wheel, and converging at theirupper ends, a plate provided with apertures to receive and retain theends of said bars, and a conical cap inclosing said plate and the endsof said bars and provided with a pivot-pin, substantially as described.

2. A bicycle-frame comprising among its members the front fork,consisting of four bars, united in pairs at their lower ends to engagethe axle of the front Wheel, one bar of each pair having flattenedportions overlapping flattened portions of the other and brazed thereto,the upper ends of said bars converging,a plate provided with aperturesto receive and hold the ends of said bars, and a conical cap inclosingsaid plate and the upper ends of said bars and secured thereto, andprovided with a pivot-pin, substantially as described.

3. A bicycle-frame comprising among its members the front fork,consisting of four bars united in pairs at their lower ends to engagethe axle of the front Wheel, one bar of each pair having flattenedportions overlapping flattened portions of the other and brazed thereto,the upper ends of said bars converging,a plate provided with aperturesto receive and hold the ends of said bars, and a conical cap inclosingsaid plate and the upper ends of said bars, said cap being provided atits upper end with a pivot-pin and at its lower end with a series ofextensions or arms, one of which engages and is secured to each of saidbars, substantially as described.

4. A bicycle-frame comprising among its members, two pairs of convergingbars, the adjacent faces of each pair being flattened at an angle totheir axes, and a forging provided with an eye, and a pair of flattenedarms each arm lying between and secured to the fiattened portions of oneof said pairs of bars, substantially as described.

' MIKAEL PEDERSEN,

\Vitnesses:

G. F. REDFERN,

Joan E. BOUSFIELD.

